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TELEGRAPHONE APPARATUS.

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able dictating may UNITED STATES PATENT OFFICE.

EJNAli. ALEXANDER HYTIEN, 0F OOPENHAGEN, DENMARK, ASSIGNOR TO AMERICAN TELE- GRAPHONE COMPANY, A

CORPORATION OF THE DISTRICT OF COLUMBIA.

TILIGBLPHONB APPARATUS.

Bpodcation of Letten Patent.

Patented Jah. 12, 1900.

Application mod november 81, 1907. Bath] No. MIM?.

To all whom 'it ma concern:

Be it known that I, EJNAB ALEXANDER H man, a' subject of the of Denmark, residing at Copenhagen, Denmark, have invented certain new and useful Improvements in Telegraphone A paratus, of which the following is a full, clar, and ,exact descri tion.

T is invention relates to improvements in tclegraphone apparatus, which are used as dictating apparatus, and the various parts are arranged in such a manner as to make it possible to record the speech from a telephone apparatus in one place for example, a managers station on a telegraphone apparatus in another place for example, a stenographers station. It will thus be possible for the person dictating to control from his seat the advancement, reversal and stopping of the telegraphone apparatus, being able at any time by means of a dial indicator to watch on which part of the wire speech is recorded. He is likewise able to hear from his seat both continuously and in separate parts, and by means of a relay it is possible to bring eifacing magnets into and out ofaction.

The telegra hone apparatus, which will generally be placed in room other than that m which the person dictat-ing is provided with removable spools with steel wire, which spools can quickly and easily be exchanged.

The spools removed from this apparatus may be placed on another telegraphone apparatus after having been re-spooled, 1f necessary, on a special spooling-apparatus, and from this latter telegraphone apparatus, which is provided with push buttons for controlling the dial indicator and tele hone, the clerk who is to record the speecii may hear the same, either in separate arts or continuously for purpose of comparison.

Without departing from the nature of the invention the said apparatus may of course be somewhat modiiied. It is for instance possible to speak directly into the apparatus from which the dictation is given out, and the re-spooling on a ia] apparatus may he replaced by the te egraphone ap aratus being itself moved backward, and i desirbe eiected by means of a telephone transmitter arranged qu the apparatus itself. The arrangements first mentioned have been proposed with a view to what has been dictated has his seat,

the arrangement of the special saving time,

apparatus for the dicta telegraphone and re-s ooling a ble to e ect the ctation and transcription quite inde endently of each o In the dprawings Figure 1 shows an elevation-of a telegraphone apparatus, thej box, in which it is supposed to be removed; F'g. 2, a rear elevation of the same; Fig. 3, a `view from above; Fig. 4, the ap aratus seen from below; Fig. 5, the dial in icator with push buttons; Fig. 6 the arrangement f the contact-sp belonging thereto' Fig. 7 an elevation of cator, the box being removed; Fig. 8 a view of the same from above; F' 9 the same seen from below; F' 10 Some etails of a. slight modification; Fig. 11 the spool with fastening arrangements for the wire; Fig. 12 a bow two tools; Fig. 15, a. front View of a table with a telegraphone apparatus, a dial indicator and a typewriter; Fig. 16 a side view of the same; Fig. 17 a View of the same from above; Fig. 18 a diagram of the motor circuit; Fig. 19 a diagram of batteryand telephone-circuits for the part of the apparatus from which the dictating takes place; Fig. 20, a diagram of batteryand telephone-circuits in the telegraphone apparatus, which records the Speech; Fig. 21, a diagram of batteryand telephonecircuits for the apparatns, which is placed on the table shown in Figs. 15-17, from which the speech is heard. Figs. 22and 23 show detalls; Fi 24, a -circuit-diagram of the telephone wi line wires belonging thereto Figs. 25, 26, 27 and 28 show details.

In Figs. 1-4 a indicates on which for the shafts c and d, both of whlch on the one end carry cylinders e, on which the removable spools f are placed. The spools are prevented from turning relativeto the cylinders e, these latter being provided with grooves g, in which are arranged pins z (Fig. 3), actuated by springs. The upper end of this pin is hemispherical, so that a projection (indicated by lc) on the spool may be pushed into the grooves and over the pin'h, which jumps up again behind the same. In this manner the spools are rea base-plate,

ventcdfrom being turned and displace in The electrorelation to the c'linders e.

on the underside of the motor m, mounte pla/eed, being for' retai the wire; Fi 13 and 14 rung gs paratus making it possii are placed four bearing bracketses base-plate a, is reversible and carries a pulley n, over which passes a belt o, which also asses over a loose pulley p on the shaft d. E

he shaft d further carries a loose pulley i which by a belt r is connected with the pu ley s on the shaft c. When turning in one direction the pulley is by a ratchet-mechy anism connected Wit the shaft d Figs. 2 1 and 3) th'e ratchet wheel t being fixe on the l shaft d; on turning the pulle p in the o ,i

osite direction it is connec with the pu l ey g (see Figs. 2 and 3),. l

The ratchet wheel t1 Fig. 3) is fixed on the pulley g. The paw u and u1, lolppoi sitely disposed, are arranged on the pu ey l in such a manner, that one of the paw s I when engagin with its ratchet wheel, lifts f the other paw out of engagement with its Q ratchet wheel, each of the pawls being art ranged on one end of a in, revolubly arranged in the pulley p. turned in the direction indicated b' the arrow c, Fig. 2, the shaft d is turne with the same, the shaft c being then driven by means of the steel wire If the pulley p is turned in the op site direction, it is disconnected from t e shaft d and turns the shaft c by means of the belt r, the shaft d being then driven by the wire Braki of the ap aratus when stopping is electe by the bralge shoe y on the lever z actuated by the springs. 1 being pressed agkainst the pulley p. The brake shoe is ta en off by the electromagnets 2, (excited by the motor current) attracting the armature 3, which is connected with the lever z.

The shaft c carries a worm 4, meshing with the worm wheel 5 on the shaft 6, whic under the base-plate a carries the pinion 7, which meshes with a toothed wheel 8, on

1 which the cam disk 9 is arranged. By the spring 11 the roller 10, which is arranged on a bracket projecting from the lever 12, is pressed against the circumference of the cam disk 9, and the lever 12, which at its upper end carries the wire guider, is pivotal on the point screws 13 on a bracket pojecting from the base plate a. As will seen from Fig. 1, the axis which joins the ivot points 13 of the lever 12 extends in a irection parallel to the length of the wire w.

The thin iron cores 15 in the coils of the electromagnets 14 are connected in pairs by the connecting pieces 16. The iron cores are pressed against tlie wire w by the bow s rings 17. If the wire is to be laid between t e cores 15, these are withdrawn a little from each other by the branches of the tool shown in Fig. 14 be' pressed down between the pieces 16, us. separati the cores. Th. wire w 1s further id between` the four uplrghts 18 an two horizontal pins 19, w are laceable and connected with each other.' Figs. 1, 2, 3

and 28). By pushing the buttons 20 both f the pulley p is 1 I pins and springs.

of the pins 19 are displaced, so that the wire can easily be laid down. On releasing the buttons 20 the wire w will be locked up by the springs 21, as will be clearly understood from l1`i 28. arrange an insulating button 22, acted upon by a spring, which button is kept down by the Wire w, thereby keeping open certain contacts, which are closed when the wire is run out or broken by an accident. causes the apparatus to stop in the manner later on described.

In Fig. 11 is shown how the end of the wire m is fastened to the spool f. 0n this latter is arranged a thin plate 23, which is slightly inclined to the bottom ofthe spool so as to form a narrow Wedge-shaped opening,' in which the wire can be fastened by means of the knife-shaped tool 24 shown in F 13.

On the Wire guider is further Y This Y' 'When the apparatus runs out, the wire m is 1.

drawn out om the fastening, and the end of the rather stiff wire is retained on the filled Aspool by means of the retainers 25, which by the springs 26 are pressed slightly against the circumference of the filled wire- :y

disk iscarried round by friction. Insulating pins 29 arranged on the disk can keep certain contacts closed or open, acting upon the contact springs by the pressure due to the frictional drive, and the movement of the disk 28 is limited, by means of the said An insulating rollerl 30 provided with three cams is fastened to the gear 8. These cams are in certain places provided with notches 31, Fig. 4.- On the circumference of the same three rubbing springs 32, 33 and 34, Fig. 1, which sliding down into the notches 31 close contacts with the contact springs, which serve for working the dialindicator or indicators in the manner later on described.

In Fig. 4 is further shown the transformers 35 for the telephone current, the safety fuse 36 for the motor current, a relay 37 for the backward movement used at the giving out, and finally the principal controlling rclay 38 for the motor current. The relay 37 is provided with an electro-magnet 39, Figs. 2 y

and 4, which can attract a pivoted armature 40 carryin two insulatlng screws, one of which 41, 1 2, can close contact between the Ver -vid

and 48 with motor current, can contact scmws 57, 58, 59 and 60, 1 and 4. The shrlret. arms of the elbow evers and 52 furt r contact 61 an 62, which can 301g contact trlllngsthe forkshaped contact ri 63. From each of the long arms of the elbow levers 51 and 52 pro- ]ects an arm,

ends of which are step-shaped as shown in Fig. 4, (where part of the e.ectrn magnets is broken away inY order to show this). arms 64 and 65 are prtmed against each other by the springs 66 and 67 upon the levers 51 and 52 respectively, and the said arms can besides the position shown in Fig. 4 asume the positions shown in Figs. 22 and 23. If the various parts asume the position shown in Fig. 4 and the armature 49 is attracted by the magnet 47, the arms 64 and 65 will assume the 'tion shown in Fig. 22, when contact is c osed between the springs 55 and 56 and the contact-screws 59 and 60 ively, as also between the springs 61 and 63. If the amature 50 be attracted the parts will shown in ig. 23, and the just named c tacts will be interrupted, while the springs ed and then simultaneously released, the various parts will rcaasume the position shown in Fig. 4, in which all the above named contacts are interrupted.

The dial-indicator comprises a case 68 carrying a dial 69, over which moved. The shaft of the hand carries a worm gear 71, Figs. 7 and 8,

e worm wheel 72, the shaft ries two cross-shaped armatures 73 arranged branches. Between the armaposition wanted by hand is further arranged .On the nave of the close contact with the assume the position I a lpin 81, Fig. 7, or 89,

w en the hand is contact with the spring 82, makes contat hand is turned in one Fig. 10, which latter, pointingto zero, makes with the spring 83, if the direction, but with the spring if the hand is turned in the other d proachlng the arrangement shown one single spring 85,

the hand is apson dictating in order Wire is about to run ont. 0n this apparatus are further aria nged the by pushing signal is the telegra exchanged. itself, from arranged the contact contact springs s6 and 87, and the button ss,

rig. 5, a. ben sa given to the person attending to phone apparatus tention to the fact that the calling his atspool is to be At the telegraphone apparatus which the dictation is given out, a similar apparatus, but without springs 86 and 87 and with the arrangement of the contact springs 82, 83

and 84, shown in Fig. 1 paratus to stop automatically, when the hand' 90 0, causing the ap- 91, and 92. ushing the button 90 causes contact to be made between the springs 93 and 94, Fi 6, effecting the starting of the 95 apparatus to stop,

button 92 c the sprino's of th t', Figs.

e apparatus in the reverse 1s mounted th tus, 100, from which the spring 97, causing the and finally pushing thc auses Contact to be made between 98 and 99, effecting the starting direction.

a table on e telegraphone apparadictation takes place, dial-indicator 101, ar-

15-17, which show 5, asalso 106, 10T and 110 telegraphone apparatus Similar manner as in 'n in Figs. 5 and 6.

lo has to tran- 1n parts. For Sake of convenience the upper pivot, so as down into any from the di 21 and 24.

part of the table is arran ged on a central ble the person, who has to apparatus as well to bringr either of the two him. Besides or insaid push-buttons correspond to ena of the different apparatus erent circuits will be understood agrams shown in Figs. 18, 19, 20,

Fig. 18 shows the diagram of the 13C motor-circuit. 109 and 110 indicate the connection to a suitable source of current. The current flows from the contact 109 through the wire 111 and the field coils 112 of the motor, through the wire 113 to the contactscrew 60 on the relay 38 (Figs. 1, 2 and 4) through the wire 114 to the contact screw 57, through the contact-spring 53, wires 115 and 116 and the armature windings of the motor, through wire 117 to the contact-spring 54, through the contact-screw 58.and wire 118, through the electro-magnets 2 of the brake apparatus, through the wire 119 to the contact 110, inciuding at some point the safety-fuse 36, Figs. 2 and 4. With the connections as above described the brake is held out of action. and the motor runs in the direction, which has been denoted the forward direction. For running in the reverse direction the circuit is as follows :fron1 the contact. 109 through the wire 111 and the field coils 112 of the motor through the wire 113 to the contact screw 60. contact spring 56, wire 117, the armature windings of the motor, wire 116, contact-springs 55, contactscrew 59, wire 120 to the contact-screw 58, wire 118, electromagnets 2 and wire 119 to contact 110. In the position of the 4contacts of the relay 38 shown in Fi 18, the current has been broken by the re ay and the apparatus is stopped. In Figs. 19 and 20 are shpwn the circuits, by which the said relay 38 is controlled by means of the push-buttons and the dial indicator, as also the circuits by means of which the dial indicator is worked, in connection with the apparatus on which the speech is recorded. The wires 121-132 shown in Fig. 19 are continued in Fig. 20, and must here be imagined connected with the terminals, marked with the same numbers by means of wires, which for sake of olearness have been omitted in the drawings. In Fig. 20, 133, 134, and 135 indicate three sets of contact-springs, arranged in parallel with those belonging to the push button 90, 91 and 92, Fig. 5 and shown in Fig. 6, it being convenient to be able to control the apparatus also at the very place where it is situated. The battery for the relay and the dial indicator is indicated by 136, Fig. 20. lf the apparatus is to be started in the forward direction, contact between the springs 93 and 94 is made by pushing the button 90. The current then Hows from the battery 136 through the wires 137 and 138, the electro-magnet 48 of the relay 38, the wires 139 and 128 to the contactspring 94, contact-spring 93 through the wires 126 and 140 back to the battery. The relay 38 will then direct the current to the motor as previously named through the contacts 53, 57 and 54, 58 (Figi 18). If the apparatus is to be stopped, t e button 91 is pushed, causingl a circuit to be made as follows :-fr0m t e battery 1136 through the l 142 to the contacts rings are connected s It must'further be ob-V wires 137 and 138; here the current is divided into two branches, viz: one through the electro-magnet 47, wires 141, 127 and ring 96; here it rejoins the other branch Prom the wire 138, the electromagnet 48, wires 139, 128 and 143, the contact-spring 95; hereh'om the rejoined currents flow through the contact-spring 97, the wires 126 and 140 back to the battery 136, whereby both armatures 49 and 50, of the relay 38 are attracted, and the motorcircuit is broken as previously explained. If the button 91 is released, the circuits are broken, but owing to the arms 64 and 65 the relay 38 will assume the position shown in Fig. 4, and the motor-circuit remains interrupted. If the apparatus is to be run in the reverse direction, the button 92 is pushed, causin the following circuit to be 1nade:-from t e battery 136 through the wires 137 and 138, the electro-magnet 47, wires 141 and 127, the contact-springs 98 and 99, Fig. 19, through the wires 126 and 140, Fig. 210, back to the battery 136. Hereby the amature 49 of the relay 38 is attracted and the motor circuit is closed through the contacts 55, 59 and 56, 60, Fig. 18, causing the wire :n to run in the reverse direction. The stopping is eiected, as mentioned above, by pushing the button 91.

The dial indicator shown'in F- 5 is brought into operation in the fo owing manner :-Owing to the rotation of the roller 30 (Figs. 1, 4 and 20) during the working of the apparatus, the rubbing-sprin 32, 33 and 34 will at regular intervals sli e down into the notches 31 in the cams on the roller 30, making contact with the springs arranged opposite to the same, all of which to each other, as own in Fig. 20. served that the circuits thus closed ass a contact between the springs 146 and 147, Figs. 2 and 20, kept closed by the brake lever z, when the brake is taken olf, z'. e. when the apparatus is ru by this means it is rendered impossible or the bat closed throng have to tery circuit to remain h one of the electro-magnets of the dial indicator when the apparatus is at rest. The currents working the dial indicator, have the following course Snppose the rubbing spring 34 has closed contact with its contact-spring, the following circuit is closed -from the batt/ery 136 through the wires 137 and 144, the contact-springs 34, wires 151 and 124, the electro-magnet 75, 19, the wires 125 and 150, Fig. 20, the contact-sp 146 and 147, the wires 148 and 140 back to the battery 136. If the rubbing spring 33 make contact, a current from the attery 136 flows through the wires -137 and 144, the rubbing spring 33, the wires 149 and 123, the electro-magnet 76, Fig. 19, wires 125 and 150 (Fig. 20), the contact-springs 146 and 147, wires 148 and changed, which device wil 140 and back to the bat 136. Finally if Hows from the battery 136 20) through the rubbing spring 32 ma e contact, a curthe wires 137 and 138, w are the current rent fmm the battery 136 Hows through the divides, inw W0 bl'lllllle, 011e 0f Whih wires 137 and 144, the rubbing spring 32, fiows through the electro-magnet 47, the wires 145 and 122, the electro-magnet 74 wires 141 and 171 $0 the wlltwb-B ring 169 70 (Fig. 19) wires125 and 150 (Fig. 20) conl where it rejoins the other branclli) flowing tact-springs 146 and 147, wires 148 and 140 man i through the electro-magnet 48, wires 139 back to the battery 136. In this manner the und 172 t0 the @mt-Spring 1685 from electro-magnets of the dial indicator are here the rejoined branches dow through the successively excited, and the hand is set g contact-spring 170, the wire 173, the contact- 75 in in the manner previously described. springs 146 and 147, wires 148 and 140 back W en the hand (Figs. 5, 7 and 19) has to the battery 136. This circuit is intermade one revolution, the wire a: is about to rupted between the contact-springs 146 and run out, and the pin 81 then causes a circuit 147 by the stoppage of ythe apparatus, as m be closed through the beiiisi, which is above described, and the apparatus Cannot situated near the dial indicator. This cirbe started again, until the button 22, Figs. cuit Hows from the battery 136 (Fig. 20) 1-3, is again depressed.

In Fig. 24 is diagrammatically shown the telephone used for dictating. This is of the ordinary type with a contact-spring 192 85 which can be actuated by the lingers. Each of the wires numbered 174, 175, 183 and 184 must be imagined connected to the binding screws indicated by the corresponding numbers in Fig. 19. A special relay 195, Fig. 19, can be actuated by pressing the spring 192. When the amature of the said 88, Fig. 5, give a bell signal to the person relay is attracted, contact' is made between attending to the apparatus, by actuating a the contact-springs 188 and 189; when it bell 156 (Fig.- 20) which is placed at the falls back, this contact is interrupted and 95 apparatus. This signal current flows from Contact is made between the springs 189 the battery 157 (Fig. 19), th rough the wires und 190, which latter contact is again in- 158 :ind 159, the contact-s rings 86 and 87, terrupted when the armature is attracted. wires 153, 129 and 160 ig. 2 0), through The function of this relay is either to short the bell 156, wires 161, 131 (Fig. 19), 162 circuit the secondary coil of the transformer 100 and 163 back to the battery 157. The per- 178 or the telephone receiver magnet 191, son attending to the apparatus can by means Fig. 24. of his p ush biitton, which actuatesthe con- The Circuits of the transmitter and the tact-spring 135 (B 1g. 20 CIUSG 1h@ Rpreceiver of the telephone are as follows: PRI'HUS t0 Illn 01111 and thn @XChIlge the The primary current of the transmitter cir- 105 spool, After having exchanged the Spool a cuit Hows from the battery 157, (Fig. 19) beltsignal can be ven by means of the bell through the wires 158, 176 and 174 (Fig. 154 011 the 111111 l11 ltm (Flg- 19) by Push' 24), the contact-springs 192 and 193 (conmga button causing two contact-springs164 met. between same being ke t closed while and 169 (F 20) 10.111311@ Contact, glVlll" speaking), the wire 196 tlhe transmitter 110 notice that t e dictating can be continuer. 194, wires 175 and 177 F1' 19) the pri- Th? Said Slgnalclll'l'l-t HOWS from the bt" mary coil of the transformer 178, through try 136 through the Wlres 137 and 121 (Flgthe wire 163 back to the battery 157. Ti.J 19`) the beu 104, WHGS 152, 153, 129, 160 depression of the spring 192 (Fig. 24) ef- (518390) and-166 1311 Contactspl'lngs 165 fects the closing of a circuit through the 115 and 164, the wires 161 and 140 back to the relay 195, (Fi 19), whereby Contact is battery 135- made between t e springs 188 and 189, as

There further remains to be mentioned above mentioned. This circuit passes from the device for ca using the apparatus to stop, the battery 157, through wires 158, 176 and when the saine is to run completely out, as 174 (Fig. 24), the contact-springs 192 and 120 above mentioned, when a spool is to be ek- 193, wires 196, 184, 185 (Fig. 19) and 181,

likewise 8.0 1f the electro-magnet 186, wires 187, 162 and the wire c: is accidentally broken. The biit- 163 back tothe battery 157. ton 22, 1, 2 and 3, arranged on the Wire The magnets 14 shown in Figs. 1, 2 and 3 guider, is kept down by the tightened wire will in the following bedenominated as efa: causing contacts to be kept open between lfgming. and S-magnets, each of the contactrings 168 and. 169, and b0- which is in this apparatus provided with tween 169 all 170.` If the WIIB l'llns 01112 0I two windings, If Speech is to be efaced breaks these contacts are closed, causing the without the apparatus cari-yin out any apparatus to stop. In such a case a current other function, a current is led t rough one 85, thepin 81, Wires 155, 125 and 150 (Fig. 20) contact-springs 146 and 147, wires 148 and back to the battery 136. The sounding of the bell continues until the contact between the contact-sprin i 146 and 147 is interrupted by stopping t apparatus, for instance by pushing the button 91. The person dictating can now by pushing the button on each of the 4 magnets. If

winding eaced at same time as new speech is to be s eec'h is recorded, one winding of each of tiie magnets first passed by the wire :v while advancing, is used for the eiacing. The etacing-current is then led through the one winding of each of the other two magnets, whereby the wire is magnetically polarized; the other two windin s on the latter magnets are used for recor ing the speech. The other winding on the former magnets is always connected with a telephone receiver 197 (Fig. 20), by which the person attending to the apparatus is enabled to hear what is spoken to the telephone shown in Fig. 24. In Fig. 20 the speaking-magnets are indicated by 198 and 199, and the effacing-magnets by 200 and 201. rl`he secondary speaking-current {iows fromthe secondary winding of the transformer 178 (Fig. 19) through the wires 132 and 179 (Fig. 20), the speaking-magnet 198, the wire 202, the speaking-magnet 199, wires 180, 130 (Fig. 19), 181 and 182, the contact-springs 188 and 189, the wire 203 back to the transformer 178. If the person dictating wants to hear the speech or part of the same, the apparatus is reversed by means of the pushbutton 92 (Fig. 5), as previously described, and when the apparatus after having run backwards a distance (the length et' which can be observed on the dial-indicator), is again run in the forward direction by pushing the button 90, the contact between the springs 192 and 193 (F ig. 24) being interrupted, the speech can be heard in the receiver. Thx circuit of the telegraphonecurrent is then as followszv-From the speaking-magnet 198 (Fig. 20), through the wires 179, 132 (Fig. 19), and 204, the coutact-sprin s 190 and 189, the wires 203, 205 and 183 `ig. 24), the receiver-magnet 191, the wires 184, 185 (Fig. 19), 130 and 180 (Fig). 20), the speaking-magnet 199,the wire 202 ack to the s eaking-magnet 198.

Finally the e acing-circuit is to be described. The same is closed by pressing down the contact-spring 192, Fig. The current then flows from the battery 157 (Fig. 19), the'wires 158, 176 and 174 (Fig. 24), the contact springs 192, 193, the wires 19s, 181, 185 (Fi s. 19, 130, 20Y (Fig. 20), a resistance 207 or adjusting the intensity of the current, the wire 208, the one winding of the ma et 199, the wire 209, the one winding o the magnet 198` the wire 210, the eacing-magnet 200, the wire- 211, the eifacing-magnet 201, the wires 212, 131 (Fig. 19), 162 and 163 back to the batter 157. The telephone receiver 197 (Fig. 20) is only connected with one winding on each of the magnets 200 and 201 (Fig. 20).

The fork-lever 27 shown in Figs. 1, 3 and 4 serves for hanging up a transmitter in case it is wanted to dictate to the apparatus from the place, where it is situated, instead of from the other place, as previously mentioned. In this case the forklever serves for making and breaking contact between two sets of contact-sprin s 213, f

214, 215, 216 and 217 (Fig. 4), the ormer pair of which perform exactly the same functions as the contact-springs 192 and 193 (Fig. 24) and the three latter perform eX- actly the same functions as the contactsprings 190, 189 and 188, respectively (Fig. 19).

The spools which are taken off the apparatus may be re-spooled, if desired, on a special suitable re-spooling-apparatus, and are then mounted on the apparatus on the table shown in Figs. 15-17, which apparatus is essentially constructed like the apparatus just described, the circuit-diagrams being different in to the apparatus only being used for receiving purposes. After each stopping of the apparatus a backward movement takes place for soiu'e seconds. the receiver is shortcircuited during the backward movement, :1 nd finally an automatic stopping of the apparatus is etfccted by the dial-indicator.

Fig. 21 shows the diagramof the relayand speakingcircuits of this apparatus.

The motor-current-diagram is identical with that shown in Fig. 18.

The dial-indicator 101 shown` in Figs. 1547 is essentially similar to the one previously described with the exception that the bells und thereto belonging push-buttons are not found here: the hand with the pin 89 uctuates the set of contact-springs shown in Fig. 10. The diagram of the battery-circuit driving the dial-indicat or is exactly like the one previously described. As the person. who is to hear and transcribe the speech, generally uses a head-receiver in order to have both hands free. it is essential that the .speaking-current or the telephone he shortcircuited duringr the backward movement, :is the unintelligible sounds would disturb him. rl`he device shown in Figs. 223-27 servesl for accomplishing this.

()n the pins 29 shown in Fig. 4 on the disk 28 is mounted an ebonite-plate 228, the edge of which is provided with the two oblique notches 230. (Figs. 25 and 27). On the upright 229 (Fig. 4) are mounted four contact-springs 224, 226, 225 and 227, Figs. 25 and 26, (for sake of clearness the plate 228 and the said four contact-springs have been omitted in Fig. 4). Thil contactsprings 224 and 226 are connected to each other by an ebonite-piece carrying a pin 231. This pin may be either above or under the edge of the plate 228, as it can pass the oblique notches 230, as shown in Fig. 27. If the plate 228 is rotated in the direction indicated by the arrow 232, the pin 231 slides up through one of the notches 230 on the some respects owing 

